docs(helm): change `trunc 24` in base charts
docs(helm): change `trunc 24` in base charts

The upper limit for a chart name is 63 characters now instead of
14 or 24 in older versions of Kubernetes. This replaces `trunc 24`
in the example chart provided to `trunc 63` to reflect the new
length available.

Closes #1637

iamzhout/helm,michelleN/deployment-manager,fibonacci1729/helm,appscode/helm,adamreese/deployment-manager,SlickNik/helm,flynnduism/helm,technosophos/deployment-manager,FengyunPan/helm,adamreese/deployment-manager,rbwsam/helm,adamreese/deployment-manager,michelleN/deployment-manager,kdada/helm,FengyunPan/helm,technosophos/deployment-manager,kdada/helm,technosophos/deployment-manager,SlickNik/helm,technosophos/deployment-manager,bacongobbler/helm,qwangrepos/helm,technosophos/k8s-helm,technosophos/k8s-helm,appscode/helm,eicnix/helm,bacongobbler/helm,yan234280533/helm,rbwsam/helm,adamreese/helm,fibonacci1729/helm,iamzhout/helm,flynnduism/helm,jascott1/helm,adamreese/helm,sushilkm/helm,michelleN/deployment-manager,bradj/helm,michelleN/deployment-manager,jascott1/helm,helm/helm,eicnix/helm,adamreese/deployment-manager,helm/helm,adamreese/deployment-manager,sushilkm/helm,thomastaylor312/helm,technosophos/deployment-manager,qwangrepos/helm,thomastaylor312/helm,yan234280533/helm,bradj/helm